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Bob - K6UDA <whpmotorsports@...>
Mine is very simple. Made entirely from 1/2 inch copper tubing. Plans are readily available on the internet. Just type in copper J-pole plans into a search engine. The base of mine is made long (2 feet extra) and I've got it clamped to my chimmy with a metal strap and muffler clamps. I've used LMR400 feedline on mine because the 100 ft run created 12db loss using rg59.
For a copper j-pole, you'll need 6 ft of tube, 2 solder caps, 1 tee, 1 90 elbow. You'll also need a pl-259 connector and a hunk of conductor wire. minus the feedline, about $25 at home depot.
Happy Hunting,
Bob
toggle quoted messageShow quoted text
--- In W6EK@yahoogroups.com, "Saundby" <saundby@...> wrote:
Bob, I think you mentioned a 2m j-pole you use to me at the meeting. I wonder if you can tell me some more about it, like construction details, how you've got it hung up and how it's working for you.
I'm going to be trying again soon to get some 2m SSB out of here, too (with a quickie horizontal Yagi, I'm looking at the j-pole for FM), it turns out the feedline I used the first time had a kink in it where the center conductor pushed through the foam and into the shield, shorting it out. I'll be cutting it off at the kink, rechecking it, then putting a new connector on when time allows.
Mark, W8BIT
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Bob Naylor <wotbob01@...>
| Guys, Here's a link to a coax loss calculator.
Bob WE6C
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--- On Thu, 1/19/12, Bob - K6UDA wrote:
From: Bob - K6UDA
Subject: [W6EK] Re: 2m J-Pole?
To: W6EK@...
Date: Thursday, January 19, 2012, 9:35 AM
Mine is very simple. Made entirely from 1/2 inch copper tubing. Plans are readily available on the internet. Just type in copper J-pole plans into a search engine. The base of mine is made long (2 feet extra) and I've got it clamped to my chimmy with a metal strap and
muffler clamps. I've used LMR400 feedline on mine because the 100 ft run created 12db loss using rg59. For a copper j-pole, you'll need 6 ft of tube, 2 solder caps, 1 tee, 1 90 elbow. You'll also need a pl-259 connector and a hunk of conductor wire. minus the feedline, about $25 at home depot. Happy Hunting, Bob --- In W6EK@..., "Saundby" wrote: > > Bob, I think you mentioned a 2m j-pole you use to me at the meeting. I wonder if you can tell me some more about it, like construction details, how you've got it hung up and how it's working for you. > > I'm going to be trying again soon to get some 2m SSB out of here, too (with a quickie horizontal Yagi, I'm looking at the j-pole for FM), it turns out the feedline I used the first time had a kink in it where the center conductor pushed
through the foam and into the shield, shorting it out. I'll be cutting it off at the kink, rechecking it, then putting a new connector on when time allows. > > Mark, W8BIT > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/W6EK/<*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/W6EK/join (Yahoo! ID required) <*> To change settings via email: W6EK-digest@... W6EK-fullfeatured@...<*> To unsubscribe from this group, send an email to: W6EK-unsubscribe@...<*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
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Bob,
Thanks. Will post this under the current link on our site from: "Coax attenuation charts courtesy W4RP"
73, Carl
On Jan 19, 2012, at 11:36 AM, Bob Naylor wrote: | Guys, Here's a link to a coax loss calculator.
Bob WE6C |
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Dennis - WU6X
FYI, to get a good match you should also feed it with a 1:1 balun. The balun can be made up of a length of coax, 26-1/2 inches braid-to-braid. Roll the coax into a coil and solder all the braids together. One end of the coil's center conductor should attach to the feedline center conductor, and connect to the driven element. The other end of the balun (center conductor) goes to the long element. In otherwords, the braid (ground) is not connected to the antenna. Slide the connection points up/down for a 1.1:1 match.
toggle quoted messageShow quoted text
--- In W6EK@yahoogroups.com, "Bob - K6UDA" <whpmotorsports@...> wrote:
Mine is very simple. Made entirely from 1/2 inch copper tubing. Plans are readily available on the internet. Just type in copper J-pole plans into a search engine. The base of mine is made long (2 feet extra) and I've got it clamped to my chimmy with a metal strap and muffler clamps. I've used LMR400 feedline on mine because the 100 ft run created 12db loss using rg59.
For a copper j-pole, you'll need 6 ft of tube, 2 solder caps, 1 tee, 1 90 elbow. You'll also need a pl-259 connector and a hunk of conductor wire. minus the feedline, about $25 at home depot.
Happy Hunting,
Bob
--- In W6EK@yahoogroups.com, "Saundby" <saundby@> wrote:
Bob, I think you mentioned a 2m j-pole you use to me at the meeting. I wonder if you can tell me some more about it, like construction details, how you've got it hung up and how it's working for you.
I'm going to be trying again soon to get some 2m SSB out of here, too (with a quickie horizontal Yagi, I'm looking at the j-pole for FM), it turns out the feedline I used the first time had a kink in it where the center conductor pushed through the foam and into the shield, shorting it out. I'll be cutting it off at the kink, rechecking it, then putting a new connector on when time allows.
Mark, W8BIT
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Sounds great, thanks a lot.
I was thinking of attaching it to a piece of antenna rope and seeing how far up I can get it in the blue spruce outside my window.
Thanks,
---------------------------------------------------------------Electronics, Books, Video Games, etc.
On Jan 19, 2012, at 9:35 AM, Bob - K6UDA wrote:
Mine is very simple. Made entirely from 1/2 inch copper tubing. Plans are readily available on the internet. Just type in copper J-pole plans into a search engine. The base of mine is made long (2 feet extra) and I've got it clamped to my chimmy with a metal strap and muffler clamps. I've used LMR400 feedline on mine because the 100 ft run created 12db loss using rg59.
For a copper j-pole, you'll need 6 ft of tube, 2 solder caps, 1 tee, 1 90 elbow. You'll also need a pl-259 connector and a hunk of conductor wire. minus the feedline, about $25 at home depot.
Happy Hunting,
Bob
--- In W6EK@..., "Saundby" wrote:
>
> Bob, I think you mentioned a 2m j-pole you use to me at the meeting. I wonder if you can tell me some more about it, like construction details, how you've got it hung up and how it's working for you.
>
> I'm going to be trying again soon to get some 2m SSB out of here, too (with a quickie horizontal Yagi, I'm looking at the j-pole for FM), it turns out the feedline I used the first time had a kink in it where the center conductor pushed through the foam and into the shield, shorting it out. I'll be cutting it off at the kink, rechecking it, then putting a new connector on when time allows.
>
> Mark, W8BIT
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Nice, thanks.
I'll take a look at some pictures of this on the 'net, too.
---------------------------------------------------------------Electronics, Books, Video Games, etc.
On Jan 19, 2012, at 8:01 PM, gregoryd99 wrote:
FYI, to get a good match you should also feed it with a 1:1 balun. The balun can be made up of a length of coax, 26-1/2 inches braid-to-braid. Roll the coax into a coil and solder all the braids together. One end of the coil's center conductor should attach to the feedline center conductor, and connect to the driven element. The other end of the balun (center conductor) goes to the long element. In otherwords, the braid (ground) is not connected to the antenna. Slide the connection points up/down for a 1.1:1 match.
--- In W6EK@..., "Bob - K6UDA" wrote:
>
> Mine is very simple. Made entirely from 1/2 inch copper tubing. Plans are readily available on the internet. Just type in copper J-pole plans into a search engine. The base of mine is made long (2 feet extra) and I've got it clamped to my chimmy with a metal strap and muffler clamps. I've used LMR400 feedline on mine because the 100 ft run created 12db loss using rg59.
>
> For a copper j-pole, you'll need 6 ft of tube, 2 solder caps, 1 tee, 1 90 elbow. You'll also need a pl-259 connector and a hunk of conductor wire. minus the feedline, about $25 at home depot.
>
> Happy Hunting,
>
> Bob
>
> --- In W6EK@..., "Saundby" wrote:
> >
> > Bob, I think you mentioned a 2m j-pole you use to me at the meeting. I wonder if you can tell me some more about it, like construction details, how you've got it hung up and how it's working for you.
> >
> > I'm going to be trying again soon to get some 2m SSB out of here, too (with a quickie horizontal Yagi, I'm looking at the j-pole for FM), it turns out the feedline I used the first time had a kink in it where the center conductor pushed through the foam and into the shield, shorting it out. I'll be cutting it off at the kink, rechecking it, then putting a new connector on when time allows.
> >
> > Mark, W8BIT
> >
>
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